Supco SET197 Hi-Limit Dryer L250-80 Thermostat Fuse Kit For Whirlpool 3977767, 3399693 THERMOSTAT & FUSE KIT - This high-quality part is a direct replacement for Whirlpool WP3977767, AP6009043, 3977767, 3399693, ER3977767, PS11742185, TJ90SET185, WP3977767VP. PREMIUM REPLACEMENT - Supco SET197 Hi-Limit Dryer L250-80 Thermostat Fuse Kit is designed to meet or exceed OEM specifications. HIGHEST-QUALITY PARTS - Supco parts are built to last and a popular choice among repair technicians and DIYers.